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BPI is expressed in sputum samples of CF patients. BPI mRNA was detected with specific primers by reverse transcription-PCR (A) of sputum-derived cells from CF patients. BPI was detected by immunoblotting (B) whole-cell lysates of sputum-derived cells. BPI mRNA (panel A, lanes 1 to 7) and protein (panel B, lanes 1 to 6) are shown for the same CF patients.
